diet food again??

Arggg.. help me!!

Starting to no any appetite to eat anymore!!

Before, never no appetite!

After, no appetite eat!
diet food at last few week,
Because, no any appetite to eat!!
turn to 45kg,
this week just had few days have appetite to eat [turn ro 48 kg]!!
But,
today start to no any appetite eat!!
What happen to me again??